How one House primary in Illinois could determine who oversees Capitol Police

The Republican primary between Reps. Rodney Davis and Mary Miller in Illinois' 15th District is emblematic of the choice GOP primary voters face: Trump-type hardliners who deny the validity of the 2020 election versus conservatives who voted to certify President Joe Biden's victory and supported a bipartisan investigation into the assault on the Capitol on Jan. 6, 2021. The race could also have lingering impacts on who oversees federal elections and the U.S. Capitol Police, a position that holds more weight after the Capitol riot.

Miller has been seen as the slight front-runner in the race. Former President Donald Trump backed Miller and held a rally in central Illinois for her days before Tuesday's primary. At that rally, Miller said the Supreme Court's overruling of Roe v. Wade is a "historic victory for White life." Her campaign has said she misread prepared remarks and meant to say "right to life."

Over $4.6 million has been spent by outside groups looking to oust Davis, in part due to unhappiness with his vote for a bipartisan commission to investigate the Jan. 6 attacks. That commission would have differed from the select committee currently holding hearings and investigating the attempted insurrection, but the ads are still aimed at tying Davis to Democrats because of that vote.